Shoe sewing machine



snor: SEWING ummm Filed Jan. 28, 19:50

4 Sheets-Sheet 1 Oct. 18, 1932. J. SUNDER SHOE SEWING MACHINE l Filed Jan. 28, 195o 4 sheets-sheet 2 .l.' sUNDER sHoE SEWING MACHINE Filed Jan. 28

, 1930 4 Sheets-Sheet 3 Oct. 18, 1932. J. sUNDER 1,883,859

SHOE lSEWING' MACHINE Filed Jan. 28, 1930 4 Sheets-Sheet 4 kto the'flooping devices inlgthe lexact amount y required in machines having al curved hook- Patentedl ct. 178,` 1932 UNITED/ ,s'ira'riazsk JAKoE 4strNnEns oE'oBERUEsEL, GERMANY, AssIeNoE rro TEE EinM ADRIAN `& Busen,

PATENT". OFFICE'.l

E OBERUESEL, GERMANY SHOE sEwrNe MACHINE Application led'ffanuary 28, 1930, VSerial No. 423,982, and Vin Germany January 28, 1928.

Y known shoe-sewingmachines having a hooked-needlethe-takefup consists of a lever receiving an irregular swinging movementk from a cam, a crank, or an eccentric. This drive by means .of interconnecting levers; haspthe disadvantagethat it becomes wornout by the swinging mass and that for thisreasonthe exactvworling of the machine is disturbed, -According to the invention this drawback is obviated by the use of a rotaryV take-up .in kcombination with shoe-sewingymachines having a hooked needle. c YRotary take-up devices are` not vnew-and havea'lready been used in the common sewing-machines for textile fabrics. But all` these known machines providedwith a; ro-y j tary #take-up have an eye-needle.. That means that the thread runsthrough aslot Y of theneedle, rwhereasain'machines.having hook-needles' the thread must be laid into the hook of the needle bycomparativelyintrif cate devices. It has thereforebeen'an easy looper andthe pull-olf. vAs the looping can matter to provide the sewing machines workL ingl with ,eye-needles with a rotary take-up. -Butn machines having a hookedfneedle not only the stitchesk are to be formed but the thread is also to be laid into the hook of the needle. This is obtained as known-by the take place only during apart ofthe rotation Aof the machine yit is evident thatfthemo'vement of the Vseveral parts and the supply of the thread are in this case not uniform. This vnonuniform vinovementhas been obtained drawbacksof'rtheswinging take-up and to deliverfthe thread tothe ystitch forming and needle.'

f Other features ofthe invention will be Yap,- parent from the description ofthe illus-V trated embodiment thereof.

Fig. 1 is aside elevation of the' thread take-up'device at thebeg-inningof the operati'vejrotation of the disc. A`Fig. 2y is'ra'- front =elevation of Fig. 1. z Fig. 3is, aside velevation ofthe thread' take-up deviceshowing the disc in operative rotation but advanced 180 l from the position shown-in Fig. 1. Fig. 4'

is a front elevation of the vthread take-,up device at theend of the operative rotation of the disc. Fig. f'is a side elevation showing 3a is a similar fragmentary groundV plan view with the position of the various parts yas shown in Fig. 3. F ig. a is a similar fragmentary ground. plan view with the position ofthe various parts as shown in Fig. 5K.

fixed'onthe end of ashaft 3 journalled in the frame f2 of the machine. endk of -thexshaft 3 there is'fixed atoothedvwheel 4 whichis driven by means of the intermediate l toothed-wheels 5v and `6 by the toothed-wheel 8 fixed on the main-shaft 7, `see Figs.1and2.v Y Y During, one rotation of the maehineth'e take-,up-disk 1 "makes two rotations, anoperative one, see-Figs. 1-4, and an inoperative one, see Figs. l5 and 6. vOn the take-updisk there are arranged on fixed pins 9 and 10 thread-rolls .'11 and 12a `They serve for pulling downthe'thread thrown ina known manner aroundthe bobbin case 13, for a quicky locking ofthe stitch, and also for tensioning.

' of the slack of thethread. The thread runs from the yielding-auxiliary -v take-up`V 14 through an eye 15 of the thread carrier 16. The thread carrier 16 is pivotally and axially The take-upconsists of a circular diskl 0n the other i movable in the flxedmember 18 supporting the feeding body 17. vThe other end ofthe thread'carrier 16fis'in the form ofa fork 19,

whichy is connectedto the' front end of -a horizontally swinging feed-lever 21by means of la pin 20. The f feed-lever 21 is operatively connectedto main shaft 7 by means of -a Vcam disc 22y and a guide .pin 24 to swing horizontally "in a reciprocating manner, whereby upon each'rotation of the main shaft, theswinging lever 21 and the connected thread carrying bolt 16 is given` one complete reciprocatingmotion. As statedaboveV during each rotation of the main shaft 7 the ried by the yrotary take-up at opposite sides Y of its axis, means forshifting a thread intQ rock lever carried by the shaft and a cam f e means comprising a pluralityv of rolls con-,

the path of the rolls on alternate rotations of the rotary take-up,said means comprising a slidably mounted shaft, through an aperture of Whichthe thread extends, a driven member carried *byk the sewing machine, a

member carriedby the driven membervof the sevving machine and cooperating with .the

rock lever.V

6.In a thread take-up device for sewing machines equipped with a hook needleraV uniformly rotating disc,jtakeup means on,

the disc and spaced from the axis of rotation of said disc Vand reciprocating means perpendicular to the plane of the disc for placing Vthe thread on or removing it fromthe take-v Yup means.

7. In a thread take-updevice, afmain drive shaft, a rotating disc operatively connected to said drive shaft and adapted to make two revolutions for one revolution of said drivef f c shaft, takeup means on said disc,V reciprocate ing thread carrying means' cooperating with said Ytake-up means to place the thread inr4 contact with the take-up means at each alternate revolution of said disc. Y Y Y Y 8. Inashoe sewing machine operatingwith a lock-stitch, a uniformly rotatingtake-up tinuously rotating in the same plane, and a means for moving the thread into and'v out of said plane, whereby the thread is alternately engaged andk disengaged from said rolls. y

9. Inl a shoe sewing machine as defined by claim'S, in Which the said rolls are une equally spaced from the center'of rotation of said take-up means. n e

l0. In a shoe sewing machine as defined by claim 8, in Which they thread is moved e into contact With the take-up rolls at alternate revolutions of thesaid take-up means. In ytestimony Whereof'I aii'ix my signature.

JAKOB SNDEB. 

